java - 当我将字符串拆分为 2 个单词并交换它们时出现错误

Question

这是我遇到的问题

    System.out.println("Please enter the student's name in the form of Doe, John or Smith, Jane");
    name = keyboard.next();
    int index = name.indexOf(",");
    String firstWord = name.substring(0,index); // Cuts the first word from the string
    int lastIndex = (name.lastIndexOf(","))+1;
    String lastWord = name.substring(lastIndex,name.length());// Cuts the last word of the string
    switchedName = lastWord+" , "+firstWord; 
    return switchedName;

这将返回交换后的字符串，但仅当它输入为 Doe,John 时，如果我在名称之间输入空格(例如 Doe，John)，输入名称并调用它后，它会立即崩溃下一行代码只是一个 println 语句

Answer 1

您应该执行 name = Keyboard.nextLine(); 而不是 name = Keyboard.next();